Well for me "bombing" is a term used to define straightlining a hill, very little edging, no carving and seepds from 50-75kmph, maybe more.
Now I don't think companies design boards just for that lol, but I'm guessing they mean charging, which is riding fast and aggressive on hardpack/groomers and chopped up snow (aka. resort riding). A mix of aggressive carving, some bombing etc. A little stiffer board with some damping basically.